<!DOCTYPE html>
<div style="columns:30;">
    <div style="columns:1; width:0;">
        <div style="display:flex; flex-flow:column;">
            <div style="columns:1;">
                <div style="height:8px;"></div>
                <div style="break-before:column; height:4096px;"></div>
            </div>
        </div>
    </div>
</div>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script>
test(() => { }, "No crash or assertion failure.");
</script>
